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MHT CET 2023 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2023

When photons of energies twice and thrice the work function of a metal are incident on the metal surface one after other, the maximum velocities of he photoelectrons emitted in the two cases are V₁ and V₂ respectively. The ratio V₁ : V₂ is

Answer: (D)

Solution

Let the work function be . Maximum kinetic energy . Case 1: photon energy , so . Case 2: photon energy , so . Dividing,

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Question ID VK-094520